光谱学与光谱分析 |
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XRD and Raman Spectroscopic Comparative Study on Phase Transformation of γ-Al2O3 at High Temperature |
FANG Ping, HE Mai, XIE Yun-long, LUO Meng-fei* |
Institute of Physical Chemistry, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University, Jinhua 321004, China |
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Abstract The phase transformation of γ-Al2O3 at high temperature was characterized by XRD and Raman techniques. Raman results show that under the excitation at 632.8 nm, the Raman shift bands at 1 175 and 1 241 cm-1 and the other two bands at 1 370 and 1 400 cm-1 are attributed to the Cr3+ and (or) Fe3+ fluorescence bands in θ-Al2O3 and α-Al2O3 environments respectively. Compared with XRD measurements, it is more sensitive to use these two groups of Raman bands to estimate the phase formation and transformation of θ-Al2O3 and α-Al2O3. Therefore, Raman spectroscopy can deduce the high temperature phase transformation effectively. Experiments results show that γ-Al2O3 starts to transform to θ-Al2O3 and α-Al2O3 synchronously at 800 ℃, but the nature of the sample determines the final temperature of transforming to α-Al2O3.
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Received: 2005-07-27
Accepted: 2005-11-02
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Corresponding Authors:
LUO Meng-fei
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Cite this article: |
FANG Ping,HE Mai,XIE Yun-long, et al. XRD and Raman Spectroscopic Comparative Study on Phase Transformation of γ-Al2O3 at High Temperature[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(11): 2039-2042.
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URL: |
https://www.gpxygpfx.com/EN/Y2006/V26/I11/2039 |
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